Constraints on UHECR sources and their environments, from fitting UHECR spectrum and composition, and neutrinos and gamma-rays.
Abstract
We perform high-precision joint fitting of the Auger extragalactic spectrum and composition with IceCube astrophysical neutrino spectrum and upper limits, and Fermi-LAT extragalactic gamma-ray spectrum to constrain the properties of UHECR sources, the source environments, source evolution and distance to nearest source. At present, the largest source of uncertainty comes from LHC-tuned hadronic event generators, limiting the ability to derive decisive conclusions on all of the above topics. Nonetheless, we can obtain interesting constraints on UHECR, neutrino and gamma-ray sources.
The research of GRF is supported in part by the U.S. National Science Foundation (NSF), Grant NSF-1517319.- Publication:
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APS April Meeting Abstracts
- Pub Date:
- 2019
- Bibcode:
- 2019APS..APRG08005M